CN114928656A - Communication method of automobile remote control key - Google Patents
Communication method of automobile remote control key Download PDFInfo
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- CN114928656A CN114928656A CN202210464744.3A CN202210464744A CN114928656A CN 114928656 A CN114928656 A CN 114928656A CN 202210464744 A CN202210464744 A CN 202210464744A CN 114928656 A CN114928656 A CN 114928656A
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- communication
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- 230000006854 communication Effects 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004422 calculation algorithm Methods 0.000 claims abstract description 10
- 238000004364 calculation method Methods 0.000 claims abstract description 7
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000012795 verification Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/06—Notations for structuring of protocol data, e.g. abstract syntax notation one [ASN.1]
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00896—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys specially adapted for particular uses
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
- H04L63/0435—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload wherein the sending and receiving network entities apply symmetric encryption, i.e. same key used for encryption and decryption
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/26—Special purpose or proprietary protocols or architectures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
- Y02T90/167—Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computing Systems (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Computer Hardware Design (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Selective Calling Equipment (AREA)
- Lock And Its Accessories (AREA)
Abstract
The invention belongs to the technical field of automobiles, and particularly relates to a communication method of an automobile remote control key. Communication including communication content, communication format, communication time sequence, encryption mode and checking strategy; the communication content is a vehicle door lock control instruction, a trunk control instruction, a charging gun lock control instruction and a remote control vehicle searching instruction; the communication format is communication frequency, modulation mode, baud rate, coding mode and message format; the communication time sequence is the sending time sequence of the high-frequency frame in the process that the remote control key sends a control instruction to the vehicle; the encryption mode is a security algorithm and a calculation mode of encrypted data adopted by an encryption byte of communication between the vehicle and the remote control key; the check strategy is a check mode of the correctness of each frame of message data, namely a generation mode of check bytes. The invention improves the anti-theft performance of the vehicle and the convenience of remote control operation, and simultaneously does not change the traditional shape and key arrangement of the key on the premise of increasing the remote control function and does not increase the cost of a single piece.
Description
Technical Field
The invention belongs to the technical field of automobiles, and particularly relates to a communication method of an automobile remote control key.
Background
At present, the automobile remote control key becomes a vehicle standard, and as an important part in an automobile, a communication method and communication safety of the automobile remote control key and the automobile are increasingly important. The communication content, communication format, communication time sequence, encryption mode and verification strategy of the automobile remote control key and the automobile have important influences on the anti-theft performance of the automobile, the convenience of remote control operation and the shape and cost of the key.
Disclosure of Invention
The invention provides a communication method of an automobile remote control key, which improves the anti-theft performance of a vehicle and the convenience of remote control operation, and simultaneously does not change the traditional shape and key arrangement of the key and increase the cost of a single piece on the premise of increasing the remote control function.
The technical scheme of the invention is described as follows by combining the attached drawings:
a communication method of an automobile remote control key comprises communication of communication content, communication format, communication time sequence, encryption mode and inspection strategy;
the communication content is a vehicle door lock control instruction, a trunk control instruction, a charging gun lock control instruction and a remote control vehicle searching instruction;
the communication formats are communication frequency, modulation mode, baud rate, coding mode and message format;
the communication time sequence is the sending time sequence of the high-frequency frame in the process that the remote control key sends a control instruction to the vehicle;
the encryption mode is a security algorithm and a calculation mode of encrypted data adopted by an encryption byte of communication between the vehicle and the remote control key;
the check strategy is a check mode of the correctness of each frame of message data, namely a generation mode of check bytes.
Further, the communication content is composed of a message frame, a message data field, a function byte and a data byte.
Further, the message frame is composed of a preamble, a synchronization code, a data field, and an end bit.
Further, the message data field consists of function bytes, data bytes and check bytes; the message data field begins with a function byte and ends with a check byte.
Further, the function byte is composed of a command type, a command, a key number, and a key status.
Further, the data byte is composed of a key serial number, a key code, a rolling code, a random number and an encryption code.
Further, the communication format is composed of a preamble, a synchronization code, a data field, and an end bit.
Further, the lead code is Manchester code 1 of 40 ms; the synchronous code is 0xFE, and is transmitted in the form of Manchester code; the end bit is manchester code 0 of 1 bit.
Further, the communication timing sequence is as follows: the communication time sequence of the short-press key is that every time the key is pressed, 3 frames of signals are continuously sent, and each frame interval is 5 ms; the communication time sequence of the long-press key is that the key is pressed and then continuously sends signals, and each frame is separated by 5 ms.
Furthermore, the encryption mode adopts an AES security algorithm; the checking strategy adopts a checksum calculation algorithm specified by SAE-J1850, wherein the checksum length is 8 bits, and the calculation range of the checksum comprises functional bytes and data bytes, and does not comprise a lead code, a synchronization code and a wake-up code.
The beneficial effects of the invention are as follows:
the invention improves the anti-theft performance of the vehicle and the convenience of remote control operation, and simultaneously does not change the traditional shape and key arrangement of the key on the premise of increasing the remote control function and does not increase the cost of a single piece.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
FIG. 1 is a diagram illustrating a high frequency message communication format;
FIG. 2 is a timing diagram of a communication process;
fig. 3 is a schematic diagram of an encryption information generation mechanism.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
A communication method of an automobile remote control key comprises communication of communication content, communication formats, communication time sequences, encryption modes and inspection strategies.
The communication content is a vehicle door lock control instruction, a trunk control instruction, a charging gun lock control instruction and a remote control vehicle searching instruction;
referring to fig. 1, the communication content is composed of a message frame, a message data field, function bytes, and data bytes.
The message frame consists of (Preamble), a Synchronization Code (Synchronization Code), a Data field (Payload Data) and a Stop Bit (Stop Bit).
The message Data domain consists of functional bytes (Func Byte), Data bytes (Data Byte) and check bytes (Crc Byte); the message data field begins with a function byte and ends with a check byte.
The function byte is composed of a command type (CmdType), a command (Cmd), a key number (foblidex), and a key Status (F _ Status).
The data byte is composed of a Key serial number (KeyID), a Key Code (Key Code), a rolling Code (PollingCnt), a random number (Challenge), and an encrypted Code (encrypted).
The communication format is communication frequency, modulation mode, baud rate, coding mode and message format;
the communication format is composed of a preamble, a synchronization code, a data field, and an end bit.
The lead code is Manchester code 1 of 40 ms; the synchronous code is 0xFE, and is transmitted in the form of Manchester code; the end bit is manchester code 0 of 1 bit.
Referring to fig. 2, the communication timing is a transmission timing of a high frequency frame in a process in which the remote control key transmits a control instruction to the vehicle;
the communication time sequence is as follows: the communication time sequence of the short-press key is that every time the key is pressed, 3 frames of signals are continuously sent, and each frame interval is 5 ms; the communication time sequence of the long-press key is that the key is pressed and then continuously sends signals, and each frame is separated by 5 ms.
The encryption mode is a security algorithm and a calculation mode of encrypted data adopted by an encryption byte of communication between the vehicle and the remote control key; with the AES security algorithm, the encryption information generation mechanism is shown in fig. 3.
The check strategy is a check mode of the correctness of each frame of message data, namely a generation mode of check bytes. The checking strategy adopts a checking sum calculation algorithm specified by SAE-J1850 (automobile communication protocol standard established by the American society of automotive Engineers). The length of the checksum is 8 bits, the calculation range of the checksum comprises functional bytes and data bytes, and the checksum does not comprise a lead code, a synchronous code and a wake-up code.
The invention improves the anti-theft performance of the vehicle and the convenience of remote control operation, and simultaneously does not change the traditional shape and key arrangement of the key on the premise of increasing the remote control function and does not increase the cost of a single piece.
Claims (10)
1. A communication method of an automobile remote control key is characterized by comprising the communication of communication content, communication format, communication time sequence, encryption mode and verification strategy;
the communication content is a vehicle door lock control instruction, a trunk control instruction, a charging gun lock control instruction and a remote control vehicle searching instruction;
the communication format is communication frequency, modulation mode, baud rate, coding mode and message format;
the communication time sequence is the sending time sequence of the high-frequency frame in the process that the remote control key sends a control instruction to the vehicle;
the encryption mode is a security algorithm and a calculation mode of encrypted data adopted by an encryption byte of communication between the vehicle and the remote control key;
the check strategy is a check mode of the correctness of each frame of message data, namely a generation mode of check bytes.
2. The communication method of a remote control key for vehicle according to claim 1, wherein said communication contents are composed of a message frame, a message data field, a function byte and a data byte.
3. The communication method of claim 2, wherein the message frame comprises a preamble, a synchronization code, a data field, and an end bit.
4. The communication method of the automobile remote control key according to claim 2, wherein the message data field is composed of a function byte, a data byte, and a check byte; the message data field begins with a function byte and ends with a check byte.
5. The communication method of claim 2, wherein the function byte is composed of a command type, a command, a key number, and a key status.
6. The communication method of claim 2, wherein the data byte is composed of a key serial number, a key code, a rolling code, a random number, and an encryption code.
7. The communication method of claim 1, wherein the communication format comprises a preamble, a synchronization code, a data field and an end bit.
8. The communication method of a remote control key for automobile according to claim 4,
the lead code is Manchester code 1 of 40 ms; the synchronous code is 0xFE, and is transmitted in the form of Manchester code; the end bit is manchester code 0 of 1 bit.
9. The communication method of the key fob of claim 1, wherein the communication sequence is: the communication time sequence of the short press key is that each time the press key is pressed, 3 frames of signals are continuously sent, and each frame is separated by 5 ms; the communication time sequence of the long-press key is that the key is pressed and then continuously sends signals, and each frame is separated by 5 ms.
10. The communication method of the automobile remote control key according to claim 1, wherein the encryption mode adopts an AES security algorithm; the checking strategy adopts a checksum calculation algorithm specified by SAE-J1850, wherein the checksum length is 8 bits, and the calculation range of the checksum comprises functional bytes and data bytes, and does not comprise a lead code, a synchronization code and a wake-up code.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210464744.3A CN114928656A (en) | 2022-04-25 | 2022-04-25 | Communication method of automobile remote control key |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210464744.3A CN114928656A (en) | 2022-04-25 | 2022-04-25 | Communication method of automobile remote control key |
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| CN114928656A true CN114928656A (en) | 2022-08-19 |
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| CN202210464744.3A Pending CN114928656A (en) | 2022-04-25 | 2022-04-25 | Communication method of automobile remote control key |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115361095A (en) * | 2022-08-25 | 2022-11-18 | 上海纳恩汽车技术股份有限公司 | Data transmission method, smart key, device, control system, and medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202929718U (en) * | 2012-11-22 | 2013-05-08 | 苏州旲烔机电科技有限公司 | Automotive vehicle remote control key |
| CN104851257A (en) * | 2014-12-19 | 2015-08-19 | 北汽福田汽车股份有限公司 | Remote controller and its method, equipment receiving remote controller message, method thereof and vehicle |
| CN108407736A (en) * | 2018-03-05 | 2018-08-17 | 奇瑞汽车股份有限公司 | A kind of control method and system of the communication of generalization automobile remote-control |
| CN114291031A (en) * | 2021-12-30 | 2022-04-08 | 上海洛轲智能科技有限公司 | Control method and device for unlocking and locking vehicle and control terminal |
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2022
- 2022-04-25 CN CN202210464744.3A patent/CN114928656A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202929718U (en) * | 2012-11-22 | 2013-05-08 | 苏州旲烔机电科技有限公司 | Automotive vehicle remote control key |
| CN104851257A (en) * | 2014-12-19 | 2015-08-19 | 北汽福田汽车股份有限公司 | Remote controller and its method, equipment receiving remote controller message, method thereof and vehicle |
| CN108407736A (en) * | 2018-03-05 | 2018-08-17 | 奇瑞汽车股份有限公司 | A kind of control method and system of the communication of generalization automobile remote-control |
| CN114291031A (en) * | 2021-12-30 | 2022-04-08 | 上海洛轲智能科技有限公司 | Control method and device for unlocking and locking vehicle and control terminal |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115361095A (en) * | 2022-08-25 | 2022-11-18 | 上海纳恩汽车技术股份有限公司 | Data transmission method, smart key, device, control system, and medium |
| CN115361095B (en) * | 2022-08-25 | 2024-04-16 | 上海纳恩汽车技术股份有限公司 | Data transmission method, intelligent key, device, control system and medium |
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